Try to think creatively! We are really interested in your perspective-- and how can you inspire and move people through the images to take action to help the planet?
As an example, Is there a particular issue or an endangered place or species that you feel strongly about?
Also read the Photography FAQ. If you're really stuck try http://imaginecup.com/Support/contactus.aspx and we'll get in touch with the Photography Captain.
Good luck!
Lisa